Airtel USSD code

Fatal error: Uncaught Error: Call to undefined function split() in /home/foabscom/public_html/tut2learn/tutblog/wp-content/plugins/sociable/includes/sociable_output.php:354 Stack trace: #0 /home/foabscom/public_html/tut2learn/tutblog/wp-content/plugins/sociable/includes/sociable_output.php(729): sociable_html(Array) #1 /home/foabscom/public_html/tut2learn/tutblog/wp-includes/plugin.php(213): auto_sociable('<table>\n<tbody>...') #2 /home/foabscom/public_html/tut2learn/tutblog/wp-includes/post-template.php(221): apply_filters('the_content', '<table>\n<tbody>...') #3 /home/foabscom/public_html/tut2learn/tutblog/wp-content/themes/news/singular.php(39): the_content('Continue readin...') #4 /home/foabscom/public_html/tut2learn/tutblog/wp-includes/template-loader.php(74): include('/home/foabscom/...') #5 /home/foabscom/public_html/tut2learn/tutblog/wp-blog-header.php(16): require_once('/home/foabscom/...') #6 /home/foabscom/public_html/tut2learn/tutblog/index.php(17): require('/home/foabscom/...') #7 {main} thrown in /home/foabscom/public_html/tut2learn/tutblog/wp-content/plugins/sociable/includes/sociable_output.php on line 354

Warning: Parameter 1 to W3_Plugin_TotalCache::ob_callback() expected to be a reference, value given in /home/foabscom/public_html/tut2learn/tutblog/wp-includes/functions.php on line 3380